Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D417/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00
  • C07D417/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings
  • C07D417/04—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings directly linked by a ring-member-to-ring-member bond
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P35/00—Antineoplastic agents
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D417/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00
  • C07D417/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings

Definitions

• the invention relates to the subject matter characterized in the claims, that is to say a novel selective epoxidation process for the preparation of the epothilone derivative of the formula I.
• the process according to the invention provides the target compound of the formula I in high chemical and diastereomeric purity, very good yields and allows the preparation on a large scale.
• Epothilone A H
• Epothilones are members of a class of promising antitumor agents that have been tested as potent against a range of cancer lineages.
• An overview of the syntheses is z. B. by J. Mulzer in Monatsh. Chem. 2000, 131, 205-238. These agents have the same biological mechanism of action as paclitaxel and other taxanes (for paclitaxel see D.G.I. Scientific, Chem. Commun. 2001, 867-880).
• a whole range of synthetically modified epothilone derivatives have been prepared, including those which carry an aromatic or a heteroaromatic grouping in the 1 position instead of the methylthiazolemethylvinyl side chains.
• Epothilone derivatives with annulated aromatic heterocycles in the 1-position are known in the patent literature, e.g. from Schering AG, WO 00/66589 and Novartis WO 2000/037473. Since these compounds are very potent anti-tumor agents, it is of great interest to have an economical and efficient synthesis of this structural class in their hands.
• Epoxidation of the exo-double bond leads in an immediate subsequent reaction to the below-mentioned undesired impurities (IMa + MIb).
• impurities can be formed from the product of formula I (by overoxidation) or even from the alkene II:
• the beta-isomer (Ia) Due to the moderate selectivity of the described epoxidation methods in addition to the target compound I, the beta-isomer (Ia) is present in the reaction mixture, from which also in analog The corresponding impurities arise. The separation of all these by-products is cumbersome and is done by a difficult, expensive and cost intensive chromatography.
• Epothilone B a / B 10: 1
• the present invention solves this problem and describes a novel process for the preparation of this Epothilonderivates of formula I starting from the well-known Dialken of formula II
• MTO methyltrioxorhenium
• substituted pyridines in particular with 4-cyanopyhdin.
• the compound of the formula (I) is obtained from the dialken of the formula II,
• dl (i) by reaction in an aprotic solvent, in particular a chlorinated hydrocarbon, preferably dichloromethane or mixtures thereof with low-boiling alkanes, trifluorotoluene or toluene
• aprotic solvent in particular a chlorinated hydrocarbon, preferably dichloromethane or mixtures thereof with low-boiling alkanes, trifluorotoluene or toluene
• Solvent in concentrations of 5 times means: 1 g of dialken in 5 ml of solvent) to 50 times (1 g of dialene in 50 ml of solvent), preferably 5-20 times, more preferably 10 times, using 6 to 36 mol% , preferably 10-25 mol%, particularly preferably 18 mol% of a substituted pyridine, preferably of an electron-poor substituted pyridine, more preferably 4-CN-pyridine, and 1-7 mol% of methyltrioxorhenium, preferably 1-5 mol%, particularly preferably 3 mol %, and
• chlorinated hydrocarbons or mixtures thereof with low-boiling alkanes or toluene or trifluorotoluene as solvent
• One aspect of the invention is the method described above when the preferred conditions
• Another embodiment of the invention is the method described above, when all particularly preferred conditions are combined, and if no particularly preferred range is given, the preferred range is to be combined:
• a particular embodiment of the invention is a process for the preparation of the compound of the formula (I),
• the process is carried out exactly under the conditions of Example 1.
• An embodiment of the invention is one of the methods as described above, wherein the reaction temperature is -60 0 C to -20 0 C.
• the reaction takes place at temperatures of -55 to -35 ° C.
• Another embodiment is the process as described in claim 1 wherein the reaction times are between 20-120 hours
• reaction times are 40 to 80 hours.
• the amount of methyltrioxorhenium is 1-5 mol%, the amount based on the dialkene.
• Another embodiment is one of the methods described above, wherein the concentrations of the compound of the formula II are from 1 g in 5 ml of solvent to 1 g in 50 ml of solvent.
• Another embodiment is one of the methods described above wherein the dialken is present in concentrations of 1 g in 5 ml of solvent to 1 g in 20 ml of solvent
• dichloromethane instead of dichloromethane, other solvents, such as 1, 2 dichloroethane, chloroform and their mixtures with pentane, hexane, heptane, cyclohexane or other low-boiling alkanes in different ratios, and aromatic solvents (arylalkanes) such as. Toluene, trifluorotoluene can be used. Dichloromethane can also be used in mixtures with the abovementioned alkanes and arylalkanes.
• Low-boiling alkanes are straight-chain and branched alkanes and cycloalkanes having boiling points of about 35 ° C to 100 0 C to understand.
• the solvent is selected from the group of dichloromethane, 1, 2-dichloroethane, chloroform, and mixtures thereof with pentane, hexane, heptane, cyclohexane, toluene or trifluorotoluene, or toluene or trifluorotoluene alone
• the solvent is selected from the group of the mixtures of dichloromethane with pentane, hexane, heptane, cyclohexane, toluene, or trifluorotoluene.
• the solvent is selected from the group of dichloromethane and mixtures of dichloromethane with pentane, hexane, heptane, cyclohexane, toluene, or trifluorotoluene.
• 2- or 4-substituted electron-deficient pyridine derivatives are substituted with CN, Br, Cl, F, CF 3 , SO 2 (C 1 -C 4) alkyl, SO 2 NH 2 , SO 2 N [(C 1 - C 4 ) alkyl] 2 , COOH, COO (C 1 -C 4 ) alkyl, in particular with CN, Cl, F, SO 2 CH 3 , COOH, COO (C r C 4 ) alkyl substituted pyridines used.
• 4-substituted electron-deficient pyridine derivatives are substituted with CN, Br, Cl, F, CF 3 , SO 2 -dC 1 alkyl, SO 2 NH 2 , SO 2 N [(CrC 4 ) alkyl] 2 , COOH, COO ( Ci-C 4 ) alkyl, in particular with CN 1 Cl, F, SO 2 CH 3 , COOH, COO (C 1 -C 4 ) alkyl substituted pyridines used.
• 2- and 4-CN-pyridine are particularly preferred.
• C 1 -C 4 -A ⁇ yI means straight-chain or branched, for example methyl, ethyl, propyl, isopropyl.
• the amount of substituted pyridine is 10-20 mol%, the amount being based on the dialkene.
• aqueous hydrogen peroxide solution is used.
• An embodiment of the invention therefore relates to a process as defined in claim 1, wherein UHP is used as epoxidizing agent.
• the chromatographic purification can be dispensed with and the crude product can be used directly in the final crystallization.
• another object of the invention is a method as described in claim 1, to which directly after crystallization followed by workup.
• the rhenium content of a compound of the formula I thus prepared is 7 7 ppm (LOD * : 7 ppm) (* level of detection, method: ICP-OES). Whether amounts less than 7ppm can be detected depends on the amount of epothilone derivative provided for the measurement. The larger the amount of epothilone derivative, the sooner a content of less than 7 ppm rhenium is detectable.
• Another aspect of the invention is also a product of the process according to the invention which still contains rhenium.
• One aspect of the invention is the product of formula I containing more than 0.0004 ppm rhenium.
• the final product contains> 0.0004 ppm to 7 ppm rhenium.
• the final product contains> 0.0004 ppm to 1 ppm rhenium.
• One aspect of the invention is the product of formula I containing rhenium in the range of 0.01 ppm to 30 ppm.
• Another aspect of the invention is the product of formula I containing rhenium in the range of 0.1 ppm to 30 ppm.
• the reaction product contains 1 ppm up to 30 ppm rhenium.
• the final product contains ⁇ 7 ppm to 30 ppm rhenium.
• the final product contains from 0.01 ppm to 7 ppm rhenium.
• the final product contains from 0.01 ppm to 1 ppm of rhenium.
• the new process allows the compound of formula (I) to be prepared in high diastereoselectivity and yield and purity.
• the method is easy to handle and allows up-scaling in the multi-kg range. It has the great advantage, in addition to the methods described in the prior art, that no precious substance is lost by attacking the exo double bond. Therefore, this method is classified as a very practical and economically valuable method.
• the following examples serve to explain the subject matter of the invention in more detail without wishing to restrict it to the following:
• Rhenium content 7 ppm (LOD: 7 ppm)

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
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• Life Sciences & Earth Sciences (AREA)
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• Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
• Pharmacology & Pharmacy (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Animal Behavior & Ethology (AREA)
• General Chemical & Material Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
• Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
• Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
• Plural Heterocyclic Compounds (AREA)
• Epoxy Compounds (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

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• 2007
  • 2007-03-30 DE DE102007016046A patent/DE102007016046A1/de not_active Withdrawn
• 2008
  • 2008-03-27 WO PCT/EP2008/002652 patent/WO2008119563A2/de active Application Filing
  • 2008-03-27 UY UY30985A patent/UY30985A1/es not_active Application Discontinuation
  • 2008-03-27 CA CA002681806A patent/CA2681806A1/en not_active Abandoned
  • 2008-03-27 JP JP2010500148A patent/JP2010523481A/ja not_active Withdrawn
  • 2008-03-27 KR KR1020097020329A patent/KR20090125259A/ko not_active Application Discontinuation
  • 2008-03-27 CN CN2008800103886A patent/CN101652362B/zh not_active Expired - Fee Related
  • 2008-03-27 US US12/056,393 patent/US20080242868A1/en not_active Abandoned
  • 2008-03-27 EP EP08734992A patent/EP2142539A2/de not_active Withdrawn
  • 2008-03-28 AR ARP080101279A patent/AR066692A1/es not_active Application Discontinuation
  • 2008-03-28 PA PA20088773901A patent/PA8773901A1/es unknown
  • 2008-03-28 TW TW097111589A patent/TW200902538A/zh unknown
  • 2008-03-28 CL CL200800901A patent/CL2008000901A1/es unknown
• 2011
  • 2011-11-30 US US13/308,046 patent/US8314248B2/en not_active Expired - Fee Related

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